Graphical user interface for a display screen



FIG. 1 illustrates a front view of a graphical user interface for a display screen; and,

FIG. 2 is a front view of a second embodiment thereof.

The broken line drawing of the display screen is for illustrative purposes only and forms no part of the claimed design. The broken line drawings of images and text are for illustrative purposes and form no part of the claimed design. 

The ornamental design for a graphical user interface for a display screen, as shown and described. 